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Ultra-high purity/superfine carbon nano tube conductive paste and preparation method and application thereof

A carbon nanotube, ultra-high-purity technology, used in circuits, electrical components, battery electrodes, etc., can solve problems such as high viscosity and less sedimentation, and achieve the effect of reducing viscosity, ensuring safety, and improving dispersibility

Active Publication Date: 2018-11-27
哈尔滨万鑫石墨谷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the carbon nanotube conductive paste prepared by it has the characteristics of uniform dispersion of carbon nanotubes, less sedimentation and no obvious layering, volume resistivity of about 50mΩ.cm, viscosity less than 15000mPa·s, and uniform conductive network, however, for raw materials, It uses a combination of thick-diameter multi-walled carbon nanotubes and thin-diameter multi-walled carbon nanotubes, and its viscosity is 5000-15000Pa·s, which still has a relatively high viscosity. The contact of substances and the transfer of electrons between active substances and carbon nanotubes will have more or less adverse effects

Method used

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  • Ultra-high purity/superfine carbon nano tube conductive paste and preparation method and application thereof
  • Ultra-high purity/superfine carbon nano tube conductive paste and preparation method and application thereof
  • Ultra-high purity/superfine carbon nano tube conductive paste and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0068] A kind of preparation method of ultrahigh purity / ultrafine carbon nanotube conductive paste, the raw material that it adopts is:

[0069]The tube diameter is 8-15nm, the tube length is 10-30μm, and the specific surface area is 280m 2 / g, the purity is 99.5% ultra-high purity / ultrafine carbon nanotubes, its ICP metal impurity composition analysis is shown in the "raw material sample" data in Table 1, and the SEM figure of this carbon nanotube powder raw material is as 1 (comprising Figure 1A with Figure 1B ) shown; the dispersant is selected polyvinylpyrrolidone (PVP); the solvent is selected N-methylpyrrolidone (NMP).

[0070] Concrete preparation method comprises the following steps:

[0071] (1') Pre-mixing and dispersing: Weigh 1 kg of polyvinylpyrrolidone and 5 kg of the above-mentioned carbon nanotubes, first add the dispersant to 94 kg of N-methylpyrrolidone, and use 1# grinding and dispersing equipment to carry out the pre-mixing process of the dispersant to m...

Embodiment 2

[0079] A kind of preparation method of ultrahigh purity / ultrafine carbon nanotube conductive paste, the raw material that it adopts is:

[0080] The tube diameter is 8-15nm, the tube length is 10-50μm, and the specific surface area is 293m 2 / g, the purity is 99.59% ultra-high purity / ultrafine carbon nanotubes, and its ICP metal impurity composition analysis is shown in the "raw material sample" data in Table 2; Dispersant selects polyvinylpyrrolidone (PVP) for use; Solvent selects N-formazol for use Nylpyrrolidone (NMP).

[0081] Concrete preparation method comprises the following steps:

[0082] (1') Premixing and dispersion: Weigh 1.25kg of polyvinylpyrrolidone and 5.75kg of carbon nanotubes, first add the dispersant to 93.0kg of N-methylpyrrolidone, and use 1# grinding and dispersing equipment to carry out the dispersant premixing process, Make the dispersant and solvent fully mixed, disperse until the solution is homogeneous, and control the temperature of the material ...

Embodiment 3

[0090] A kind of preparation method of ultrahigh purity / ultrafine carbon nanotube conductive paste, the raw material that it adopts is:

[0091] The tube diameter is 8-15nm, the tube length is 10-50μm, and the specific surface area is 284m 2 / g, the purity is 99.76% ultra-high purity / ultrafine carbon nanotubes, its ICP metal impurity composition analysis is shown in the "raw material sample" data of Table 3, the dispersant is selected polyvinylpyrrolidone (PVP), and the solvent is selected N-methyl Pyrrolidone (NMP).

[0092] Concrete preparation method comprises the following steps:

[0093] (1') Premixing and dispersion: Weigh 1.25kg of polyvinylpyrrolidone and 5kg of ultra-high-purity ultrafine carbon nanotubes, first add the dispersant to 93.75kg of N-methylpyrrolidone, and use 1# grinding and dispersing equipment for dispersant premixing process, so that the dispersant and solvent are fully mixed, dispersed until the solution is uniform, and the temperature of the mater...

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Abstract

The invention relates to an ultra-high purity / superfine carbon nano tube conductive paste and a preparation method and application thereof. The preparation method of the ultra-high purity / superfine carbon nano tube conductive paste comprises the following steps: (1) adding an ultra-high purity / superfine carbon nano tube as raw material into a mixed solution of a dispersing agent and a solvent, andperforming dispersion twice, so as to obtain initial carbon nano tube conductive paste; (2) and treating the initial carbon nano tube conductive paste obtained in step (1) by adopting a high pressuredispersing device twice, wherein the pressure range of the high pressure dispersing device is 7000-30000psi, and the flow range is 0.5-3L / min, so as to obtain the carbon nano tube conductive paste product with a small particle size and a low viscosity. The initial carbon nano tube conductive paste prepared according to the invention can come into good contact with an active substance, improve transfer of electrons between the active substance and the carbon nano tube, and full fills up gaps of anode and cathode materials of a lithium ion battery, thus being favorable for tight contact betweenmaterials and absorption of electrode.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to an ultrahigh-purity / ultrafine carbon nanotube conductive paste, a preparation method and application thereof. Background technique [0002] At present, with the shortage of global oil resources and the continuous deterioration of the climate environment, the development of human society is facing severe challenges. The development of clean and energy-saving new energy vehicles is highly valued by countries all over the world. The key to the development of new energy vehicles lies in their power sources. Lithium-ion batteries have the advantages of high energy density, small self-discharge, no memory effect, wide operating voltage range, long service life, and no environmental pollution. They are currently the main power source for new energy vehicles. [0003] A lithium-ion battery generally includes a positive electrode sheet, a negative electrode sheet, and a separa...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M10/0525
CPCH01M4/625H01M10/0525Y02E60/10
Inventor 冯晓彤袁国辉杨斌杜新伟黄须啟刘智良方振辉
Owner 哈尔滨万鑫石墨谷科技有限公司
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